<template>
<div v-if="meta" class="xhexznfu">
	<portal to="icon"><fa :icon="faServer"/></portal>
	<portal to="title">{{ $t('instance') }}</portal>

	<mk-instance-stats style="margin-bottom: var(--margin);"/>

	<section class="_card logs">
		<div class="_title"><fa :icon="faStream"/> {{ $t('serverLogs') }}</div>
		<div class="_content">
			<div class="_inputs">
				<mk-input v-model="logDomain" :debounce="true">
					<span>{{ $t('domain') }}</span>
				</mk-input>
				<mk-select v-model="logLevel">
					<template #label>{{ $t('level') }}</template>
					<option value="all">{{ $t('levels.all') }}</option>
					<option value="info">{{ $t('levels.info') }}</option>
					<option value="success">{{ $t('levels.success') }}</option>
					<option value="warning">{{ $t('levels.warning') }}</option>
					<option value="error">{{ $t('levels.error') }}</option>
					<option value="debug">{{ $t('levels.debug') }}</option>
				</mk-select>
			</div>

			<div class="logs">
				<code v-for="log in logs" :key="log.id" :class="log.level">
					<details>
						<summary><mk-time :time="log.createdAt"/> [{{ log.domain.join('.') }}] {{ log.message }}</summary>
						<vue-json-pretty v-if="log.data" :data="log.data"></vue-json-pretty>
					</details>
				</code>
			</div>
		</div>
		<div class="_footer">
			<mk-button @click="deleteAllLogs()" primary><fa :icon="faTrashAlt"/> {{ $t('deleteAll') }}</mk-button>
		</div>
	</section>

	<section class="_card chart">
		<div class="_title"><fa :icon="faMicrochip"/> {{ $t('cpuAndMemory') }}</div>
		<div class="_content" style="margin-top: -8px; margin-bottom: -12px;">
			<canvas ref="cpumem"></canvas>
		</div>
		<div class="_content" v-if="serverInfo">
			<div class="table">
				<div class="row">
					<div class="cell"><div class="label">CPU</div>{{ serverInfo.cpu.model }}</div>
				</div>
				<div class="row">
					<div class="cell"><div class="label">MEM total</div>{{ serverInfo.mem.total | bytes }}</div>
					<div class="cell"><div class="label">MEM used</div>{{ memUsage | bytes }} ({{ (memUsage / serverInfo.mem.total * 100).toFixed(0) }}%)</div>
					<div class="cell"><div class="label">MEM free</div>{{ serverInfo.mem.total - memUsage | bytes }} ({{ ((serverInfo.mem.total - memUsage) / serverInfo.mem.total * 100).toFixed(0) }}%)</div>
				</div>
			</div>
		</div>
	</section>
	<section class="_card chart">
		<div class="_title"><fa :icon="faHdd"/> {{ $t('disk') }}</div>
		<div class="_content" style="margin-top: -8px; margin-bottom: -12px;">
			<canvas ref="disk"></canvas>
		</div>
		<div class="_content" v-if="serverInfo">
			<div class="table">
				<div class="row">
					<div class="cell"><div class="label">Disk total</div>{{ serverInfo.fs.total | bytes }}</div>
					<div class="cell"><div class="label">Disk used</div>{{ serverInfo.fs.used | bytes }} ({{ (serverInfo.fs.used / serverInfo.fs.total * 100).toFixed(0) }}%)</div>
					<div class="cell"><div class="label">Disk free</div>{{ serverInfo.fs.total - serverInfo.fs.used | bytes }} ({{ ((serverInfo.fs.total - serverInfo.fs.used) / serverInfo.fs.total * 100).toFixed(0) }}%)</div>
				</div>
			</div>
		</div>
	</section>
	<section class="_card chart">
		<div class="_title"><fa :icon="faExchangeAlt"/> {{ $t('network') }}</div>
		<div class="_content" style="margin-top: -8px; margin-bottom: -12px;">
			<canvas ref="net"></canvas>
		</div>
		<div class="_content" v-if="serverInfo">
			<div class="table">
				<div class="row">
					<div class="cell"><div class="label">Interface</div>{{ serverInfo.net.interface }}</div>
				</div>
			</div>
		</div>
	</section>

	<section class="_card info">
		<div class="_content table">
			<div><b>Misskey</b><span>v{{ version }}</span></div>
		</div>
		<div class="_content table" v-if="serverInfo">
			<div><b>Node.js</b><span>{{ serverInfo.node }}</span></div>
			<div><b>PostgreSQL</b><span>v{{ serverInfo.psql }}</span></div>
			<div><b>Redis</b><span>v{{ serverInfo.redis }}</span></div>
		</div>
	</section>
</div>
</template>

<script lang="ts">
import Vue from 'vue';
import { faServer, faExchangeAlt, faMicrochip, faHdd, faStream, faTrashAlt } from '@fortawesome/free-solid-svg-icons';
import Chart from 'chart.js';
import VueJsonPretty from 'vue-json-pretty';
import MkInstanceStats from '../../components/instance-stats.vue';
import MkButton from '../../components/ui/button.vue';
import MkSelect from '../../components/ui/select.vue';
import MkInput from '../../components/ui/input.vue';
import { version, url } from '../../config';
import i18n from '../../i18n';

const alpha = (hex, a) => {
	const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex)!;
	const r = parseInt(result[1], 16);
	const g = parseInt(result[2], 16);
	const b = parseInt(result[3], 16);
	return `rgba(${r}, ${g}, ${b}, ${a})`;
};

export default Vue.extend({
	i18n,

	metaInfo() {
		return {
			title: this.$t('instance') as string
		};
	},

	components: {
		MkInstanceStats,
		MkButton,
		MkSelect,
		MkInput,
		VueJsonPretty
	},

	data() {
		return {
			version,
			url,
			stats: null,
			serverInfo: null,
			connection: null,
			memUsage: 0,
			chartCpuMem: null,
			chartNet: null,
			logs: [],
			logLevel: 'all',
			logDomain: '',
			faServer, faExchangeAlt, faMicrochip, faHdd, faStream, faTrashAlt
		}
	},

	computed: {
		meta() {
			return this.$store.state.instance.meta;
		},
	},

	watch: {
		logLevel() {
			this.logs = [];
			this.fetchLogs();
		},
		logDomain() {
			this.logs = [];
			this.fetchLogs();
		}
	},

	mounted() {
		this.fetchLogs();
	
		Chart.defaults.global.defaultFontColor = getComputedStyle(document.documentElement).getPropertyValue('--fg');

		this.chartCpuMem = new Chart(this.$refs.cpumem, {
			type: 'line',
			data: {
				labels: [],
				datasets: [{
					label: 'CPU',
					pointRadius: 0,
					lineTension: 0,
					borderWidth: 2,
					borderColor: '#86b300',
					backgroundColor: alpha('#86b300', 0.1),
					data: []
				}, {
					label: 'MEM (active)',
					pointRadius: 0,
					lineTension: 0,
					borderWidth: 2,
					borderColor: '#935dbf',
					backgroundColor: alpha('#935dbf', 0.02),
					data: []
				}, {
					label: 'MEM (used)',
					pointRadius: 0,
					lineTension: 0,
					borderWidth: 2,
					borderColor: '#935dbf',
					borderDash: [5, 5],
					fill: false,
					data: []
				}]
			},
			options: {
				aspectRatio: 3,
				layout: {
					padding: {
						left: 0,
						right: 0,
						top: 8,
						bottom: 0
					}
				},
				legend: {
					position: 'bottom',
					labels: {
						boxWidth: 16,
					}
				},
				scales: {
					xAxes: [{
						gridLines: {
							display: false
						},
						ticks: {
							display: false
						}
					}],
					yAxes: [{
						position: 'right',
						ticks: {
							display: false,
							max: 100
						}
					}]
				},
				tooltips: {
					intersect: false,
					mode: 'index',
				}
			}
		});

		this.chartNet = new Chart(this.$refs.net, {
			type: 'line',
			data: {
				labels: [],
				datasets: [{
					label: 'In',
					pointRadius: 0,
					lineTension: 0,
					borderWidth: 2,
					borderColor: '#94a029',
					backgroundColor: alpha('#94a029', 0.1),
					data: []
				}, {
					label: 'Out',
					pointRadius: 0,
					lineTension: 0,
					borderWidth: 2,
					borderColor: '#ff9156',
					backgroundColor: alpha('#ff9156', 0.1),
					data: []
				}]
			},
			options: {
				aspectRatio: 3,
				layout: {
					padding: {
						left: 0,
						right: 0,
						top: 8,
						bottom: 0
					}
				},
				legend: {
					position: 'bottom',
					labels: {
						boxWidth: 16,
					}
				},
				scales: {
					xAxes: [{
						gridLines: {
							display: false
						},
						ticks: {
							display: false
						}
					}],
					yAxes: [{
						position: 'right',
						ticks: {
							display: false,
						}
					}]
				},
				tooltips: {
					intersect: false,
					mode: 'index',
				}
			}
		});

		this.chartDisk = new Chart(this.$refs.disk, {
			type: 'line',
			data: {
				labels: [],
				datasets: [{
					label: 'Read',
					pointRadius: 0,
					lineTension: 0,
					borderWidth: 2,
					borderColor: '#94a029',
					backgroundColor: alpha('#94a029', 0.1),
					data: []
				}, {
					label: 'Write',
					pointRadius: 0,
					lineTension: 0,
					borderWidth: 2,
					borderColor: '#ff9156',
					backgroundColor: alpha('#ff9156', 0.1),
					data: []
				}]
			},
			options: {
				aspectRatio: 3,
				layout: {
					padding: {
						left: 0,
						right: 0,
						top: 8,
						bottom: 0
					}
				},
				legend: {
					position: 'bottom',
					labels: {
						boxWidth: 16,
					}
				},
				scales: {
					xAxes: [{
						gridLines: {
							display: false
						},
						ticks: {
							display: false
						}
					}],
					yAxes: [{
						position: 'right',
						ticks: {
							display: false,
						}
					}]
				},
				tooltips: {
					intersect: false,
					mode: 'index',
				}
			}
		});

		this.$root.api('admin/server-info', {}).then(res => {
			this.serverInfo = res;

			this.connection = this.$root.stream.useSharedConnection('serverStats');
			this.connection.on('stats', this.onStats);
			this.connection.on('statsLog', this.onStatsLog);
			this.connection.send('requestLog', {
				id: Math.random().toString().substr(2, 8),
				length: 150
			});
		});
	},

	beforeDestroy() {
		this.connection.off('stats', this.onStats);
		this.connection.off('statsLog', this.onStatsLog);
		this.connection.dispose();
	},

	methods: {
		fetchLogs() {
			this.$root.api('admin/logs', {
				level: this.logLevel === 'all' ? null : this.logLevel,
				domain: this.logDomain === '' ? null : this.logDomain,
				limit: 30
			}).then(logs => {
				this.logs = logs.reverse();
			});
		},

		deleteAllLogs() {
			this.$root.api('admin/delete-logs').then(() => {
				this.$root.dialog({
					type: 'success',
					iconOnly: true, autoClose: true
				});
			});
		},

		onStats(stats) {
			const cpu = (stats.cpu * 100).toFixed(0);
			const memActive = (stats.mem.active / this.serverInfo.mem.total * 100).toFixed(0);
			const memUsed = (stats.mem.used / this.serverInfo.mem.total * 100).toFixed(0);
			this.memUsage = stats.mem.active;

			this.chartCpuMem.data.labels.push('');
			this.chartCpuMem.data.datasets[0].data.push(cpu);
			this.chartCpuMem.data.datasets[1].data.push(memActive);
			this.chartCpuMem.data.datasets[2].data.push(memUsed);
			this.chartNet.data.labels.push('');
			this.chartNet.data.datasets[0].data.push(stats.net.rx);
			this.chartNet.data.datasets[1].data.push(stats.net.tx);
			this.chartDisk.data.labels.push('');
			this.chartDisk.data.datasets[0].data.push(stats.fs.r);
			this.chartDisk.data.datasets[1].data.push(stats.fs.w);
			if (this.chartCpuMem.data.datasets[0].data.length > 150) {
				this.chartCpuMem.data.labels.shift();
				this.chartCpuMem.data.datasets[0].data.shift();
				this.chartCpuMem.data.datasets[1].data.shift();
				this.chartCpuMem.data.datasets[2].data.shift();
				this.chartNet.data.labels.shift();
				this.chartNet.data.datasets[0].data.shift();
				this.chartNet.data.datasets[1].data.shift();
				this.chartDisk.data.labels.shift();
				this.chartDisk.data.datasets[0].data.shift();
				this.chartDisk.data.datasets[1].data.shift();
			}
			this.chartCpuMem.update();
			this.chartNet.update();
			this.chartDisk.update();
		},

		onStatsLog(statsLog) {
			for (const stats of statsLog.reverse()) {
				this.onStats(stats);
			}
		}
	}
});
</script>

<style lang="scss" scoped>
.xhexznfu {
	> .stats {
		display: flex;
		justify-content: space-between;
		flex-wrap: wrap;
		margin: calc(0px - var(--margin) / 2);
		margin-bottom: calc(var(--margin) / 2);

		> div {
			flex: 1 0 213px;
			margin: calc(var(--margin) / 2);
			box-sizing: border-box;
			padding: 16px;
		}
	}

	> .logs {
		> ._content {
			> .logs {
				padding: 8px;
				background: #000;
				color: #fff;
				font-size: 0.9em;

				> code {
					display: block;

					&.error {
						color: #f00;
					}

					&.warning {
						color: #ff0;
					}

					&.success {
						color: #0f0;
					}

					&.debug {
						opacity: 0.7;
					}
				}
			}
		}
	}

	> .chart {
		> ._content {
			> .table {
				> .row {
					display: flex;

					&:not(:last-child) {
						margin-bottom: 16px;

						@media (max-width: 500px) {
							margin-bottom: 8px;
						}
					}

					> .cell {
						flex: 1;

						> .label {
							font-size: 80%;
							opacity: 0.7;

							> .icon {
								margin-right: 4px;
								display: none;
							}
						}
					}
				}
			}
		}
	}

	> .info {
		> .table {
			> div {
				display: flex;

				> * {
					flex: 1;
				}
			}
		}
	}
}
</style>
